I often find people using
"I beg to request you..."
in the letters or applications that they write to their superiors.
I am not sure if this usage of "beg" is okay.
I have tried to find rationale behind adding "beg" with "request". I have been told that "beg" is added with "request" to make the request more humble or polite and sound submissive and to offer adequate respect to the superior.
There is a difference between "request" and "pray". "Request" is formally or politely asking "x" for "y", while "pray" is begging "x" for "y".
If so, then what is the rationale of using "I beg to request you..."? Why do the writers not use a simpler version: "I pray to you..."?